I always thought it was my equipment (everything from the router in). I never had problems with my original rig (Intel i7, 2080super GPU), until I upgraded to a 3070ti GPU; then I got lag, rubber banding, freezing, you name it, mainly in graphics intensive games like SoT and PUBG, especially when situations with lots of movement and up/down loading.
After upgrading ALL my interconnects, troubleshooting my hardware, checking soft and firm ware, AND upgrading to the newest most awesome cable router, I decided to try going from cable to fiberoptic (100% to router, then copper interconnects). VOILA!! I cancelled my cable internet and have not looked back. Anybody need a slightly used cable router?